Earlier quoted context omitted.
If you read the letter, it's a lot more than "answering a few questions". He gets two weeks to provide an enormous amount of detailed information about the product, I assume under threat of legal consequences if any of it contains an error, interspersed with lots of reminders that they can and will close down his business if they feel like it.
Yeah, the extremely short timeline here combined with excessive fines puts this squarely in "F-You" territory.
There's only one question which could be considered too broad, which is compliance with safety standards, but it's generously worded as a yes or no question. He could simply answer "no, I haven't analyzed my product against against the safety standards".